Proceedings Paper

A skygazer is an astronomical visual observer who uses telescopes in a field. The lighting for them is important.
Their requirements are solid-state, light weight, flicker-less, and dimming controls corresponding to photopic,
mesopic and scotopic vision. Especially, the lighting never spoils a dark adaptation at moonless night. However,
bright light is used to preparing the equipment at twilight. To satisfy their requirements, we clearly define the
illuminance range and its wave length, and then we propose smart dimming. The main idea is the dimming
method using PAM and the implementation to MCU sharing the DC-DC converter with LEDs. The next idea
is efficient use of MCU built-in components.